Invasive species cope with novel environments through both phenotypic plasticity and evolutionary change. However, the environmental factors that cause evolutionary divergence in invasive species are poorly understood. We developed predictions for how different life-history traits, and plasticity in those traits, may respond to environmental gradients in seasonal temperatures, season length and...

The complexity of organismal function challenges our ability to understand the evolution of animal locomotion. To meet this challenge, we used a combination of biomechanics, phylogenetic comparative analyses, and theoretical morphology to examine evolutionary changes in body shape and how those changes affected swimming performance in ascidian larvae. Results of phylogenetic comparative analyse...

Structural body size and adult feeding conditions seem to be important determinants of fitness in income breeding species. However, little is known about the relative importance of structural body size and nutritional state on fecundity and winter survival in carabids. In this study, two separate experiments were performed. The effects of the structural body size of females (expressed as the le...

Davies et al. (1988) concluded that body size did not directly influence annual fecundity in Lesser Snow Geese (Chen c. caerulescens, hereafter called Snow Geese). This disagrees with Ankney and Macinnes (1978) who showed that there was a positive correlation between culmen length and body mass in prelaying female Snow Geese, and that heavier females laid more eggs than did lighter females. A r...

The Chilean round ray (Urotrygon chilensis, Günther, 1872) is commonly caught as bycatch in the Mexican Pacific, but changes its reproductive ecology a consequence of fishery effects have never been investigated. In this work, species was determined Southern Gulf California (SGC). Total length (TL) ranged from 11.4 to 51.6 cm, and females were larger than males. Size at maturity (TL50) estimate...

Squaliobarbus curriculus , commonly known as red-eye fish, is widely distributed in East Asia. It one of the important aquatic germplasm resource and economic species Pearl River. To give suggestions for better protection management, we investigated its life history conducted elasticity analyses. Samples ( n = 451) were collected between 2016 2017 from western River estuary. There no significan...

In southernMexico, four native and one introduced species of Opiinae (Braconidae) attack larvae ofAnastrepha spp. fruit ßies. There is a substantial overlap in thehosts of the parasitoids, and every species has been collected from fruit ßies attacked by at least one or two other species. The ovipositors of these braconids have a broad interspeciÞc range of lengths, some are less than the length...

  This study involves the investigation of Tinca tinca (L., 1758) living in Kapulukaya Reservoir in Turkey. It was observed that the fish reach sexual maturity at the age of III and the breeding period starts in May and ends in July. The mean monthly gonadosomatic indices varied from 1.38 ±0.06 (in October) to 8.01±1.03 (in May). According to monthly variations of the GSI, spawning of the tench...